HomeMy WebLinkAboutDrainage Reports - 10/14/1995STEWARr&ASSOCIATES
Consultirxg Engineers and Surveyors
inai sport
September 12, 1995
EROSION CONTROL REPORT
FOR LOT 5, CAMERON PARK, SECOND FILING
Lot 5 is in a high rainfall erodibility zone and in a moderate wind erodibility zone. The lot slopes
from Northwest to Southeast at an approximate slope of 8.6%. It is proposed to construct two office
buildings with walk out basements on the lot. The basements will be excavated and then the
foundations poured immediately. The parking lot will be graded at the same time as the excavation.
The required erosion control effectiveness will be met by placing at least 7,000 square feet of gravel
base material in the parking lot as soon as the parking lot is graded. Also, straw bales will be placed
across the driveway where the runoff discharges into the Cameron Drive gutter. A silt fence will also
be placed along the Southerly property line and along Cameron Drive from the driveway Southerly
to the Southeast corner of the lot, and along the Westerly property line of Lot 5.
a.C�
Richard A. Rutherford, P.E. & L.S.
*' 5028
�:'T••; t' 3;
,'•,•• 41/•11 N••
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
303/482-9331
Fax 303/482-9382
STEWART&ASSOCIATES
Consulting Engineers and Surveyors
Erosion Control Cost Estimate for Lot 4, Cameron Park, Second Filing
1. 460 L.F. of Sih Fence @ $2.50/FT.
2. Straw Bale Dike
3. Re -seeding 25,801 S.F. @ $0.0289/S.F.
Escrow Amount = 1.5 x $1250 = $1875
Richard A. Rutherford, P.E. L.S.
* 5028
„f
James H. Stewart
and Associates, Inc.
103 S. Meldrum Street
P.O. Box 429
Ft. Collins, CO 80522
303/482-9331
Fax 303/482-9382
$1150
$ 100
$ 746
4- 05
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RAINFALL PERFORMANCE STANDARD EVALUATION
------------------------------------ --------------------------------
PROJECT: Lo-1 S, CAmecc.v Aq.e.t, leto. s, Fic.,u& STANUARD FORM A
COMPLETED BY: je A,2- DATE: Ate. zs,iss -
---------------------------------------------------------------------
DEVELOPEU ERODIBILITY Asb Lsb Ssb Lb Sb PS
SUBBASIN ZOIIE (ac) (ft) (%) . (feet)M (o)
------_-------------------------------------------------I-------
0.5?A" 1175 2..86%
EFFECTIVENESS CALCULATIONS
---------------------------
PROJECT: Lo.T S, C 4MersOv Pgek,SEcovc F/�.,vc .STANDARD FORM B
COMPLETED BY: _ p ,dam DATE:
j
I Erosion Control
C-Factor
P-Factor
Method
----------O+--L
Value
Value
Cormnent
----------
ARE S
70-0-------/
—-------
ot
- --- --------
FOu"Z>ATl0,7
1/IVOI1TVCZED
6.0%
Ary
O.Irc qQ.
0.07
Oa
O. ow A,
GRAVCc BA54
A oS
/, 00
O.IGD Ac.
S I4.T FENCE
I. DO
(}So
.77Zriw ZAG.ES
--------------------------------------------------------------------
.400
.. O• Bp
MAJORI PS SUB AREA
BASIN (%) BASIN (Ac) CALCULATIONS
-------------------------------
oTS 81.85 mar 5 O. SyAc
0.�1
r,()T-- P = 0.SoY O•co
(6•4,57Xo•4-o)�x;ov =9/.9
---------------------------------------------------------------------
I/SF-B:1989
•. I - CONSTRUCTION SEQUENCE
PROJECT: Lo 7.Cy CAMP.ED(/ 6g& Jkcorp F/L/Nj,
STANDARD FORM C
SEQUENCE. FOR 19 qs ONLY COMPLETED BY: RA DATE:
1
Indicate by use of a bar line or symbols when erosion control measures will be installed.
Major modifications to an approved schedule may require submitting a new schedule for
approval by the City Engineer.
YEAR
MONTH
----------------------------
OVERLOT GRADING
WIND EROSION CONTROL
Soil Roughing
Perimeter Barrier
Additional Barriers
Vegetative Methods
Soil Sealant
Other
(�,2AV 6L- 5 AsE
RAINFALL EROSION CONTROL
STRUCTURAL:
Sediment Trap/Basin
Inlet Filters
Straw Barriers
Silt Fence Barriers
Sand Bags
Bare Soil Preparation
Contour Furrows
Terracing
Asphalt/Concrete Paving
Other
Fo D,4-r/0 A)
VEGETATIVE:
Permanent Seed Planting
Mulching/Sealant
Temporary Seed Planting
Sod Installation
Nettings/Mats/Blankets
Other
------------------------------
STRUCTURES: INSTALLED BY
F11S I 19�L
111MIMnlnLu of
VEGETATION/MULCHING CONTRACTOR
DATE SUBMITTED APPROVED BY CITY OF FORT COLLINS ON
HOI/SF-C:1989
n
JANUA-?Y 1991 8-20 DESIGN CRITERIA
AR